hdu 2106

#include<stdio.h>
int change(int val,int base)
{
    int result = 0,weight = 1;
    while(val){
        result += (val%10)*weight;
        val/=10;
        weight*=base;
    }
    
    return result;
}

int main()
{
    int n;
    int val,base;
    while(~scanf("%d",&n))
    {
        int sum = 0;
        for(int i = 0;i<n;i++)
        {
            scanf("%d(%d)",&val,&base);
            if(base==10) sum+=val;
            else sum+=change(val,base);
        }
        printf("%d\n",sum);
    }
    return 0;
}

题目